Electric furnace



Patented Oct. 2, 1928.

UNITED STATES 1,686,010 PATENT OFFICE. f

ALVIN n. xEENE, or MANsrIELD, omo, assIGNon 'ro wEsrINGHcUsE ELECTRIC a nNUrAc'rUmNG COMPANY, A CORPORATION or PENNSYLVANIA ELECTRIC FUBNACE.

Application led January 14, 1927. Serial No. 161,064.

fractor?I material adapted to form a portion of the rnace wall, and metallic resistor-engaging hooks carried by said block in such a manner that portions of the block abut and v support the hooks to prevent sagging of the latter when heated.

In the drawings, Fig. 1 is a view, in lateral section, of an electric furnace embodyin my invention;

. Fig, 2 is a view, in longitudinal section, of

the furnace shown in Fig. 1;

Fig. 3 is a plan view of one of the resisitor supporting units; and 26 Fi 4 is a vertical section thereof on the line IV-IV of Fig. 3.

Referring to the drawing, 1 indicates an electric furnace of the resistance ty e-comprising a casing 2 and layers of re ractory 80 blocks 3, so located and arranged as to form a chamber 4, upon the walls of which is mounted a resistor 5. The resistor 5 comprises a preformed plurality of parallel convolutions of either ribbon or rod supported by means of metallic hooks 6 of substantially S-shape, carried b blocks 7 which are of refractory materia and constitute a part of the furnace wall. The metallic hooks are formed preferably from round stock, the ends of which are bent at right angles to the central portionand in opposite directions. As shown in Figs. 3' and 4, the blocks are formed to embody a plurality) of spaced projecting portions 8 extending eyond the plane of the furnace wall, sald projecting partsbeing substantially flat on their upper surfaces 9 with the flat portions extending into the block proper and terminating in holes 10, the axes of which are angularly w dis osed with respect to saidsurfaces 9.

eferring more particularly to Fig. 4, it will be noted that one of the ends of the metallic hook 6 is inserted in hole 10 of the supporting block so that the central portion of the member 6 is supported upon the surf .face 9 of projection 8 of the block, and is nace wall for s acing the convolutions of resistor 3 along t e furnace walls, to prevent engagement therebetween during the operation of the furnace. In practice, the hooks 6 are inserted in the blocks 7 as shown in Figs. 3 and 4, and the blocks then tted into the furnace wall as shown Fig. 1, during the building of the furnace. The upper loops of the reformed resistor ribbon are then positione upon the metallic hooks 6 and extend between the spacers 12 so that each convolution is supportedby ametallic support 6 and retained 1n. that position by the upturned portion thereof.

It will be noted that the metallic supports are in effect embedded in the furnace wall and interlocked therewith and, because of their angular shape, may not be removed therefrom or turned therein. Also any tendency of -the metallic supports to sag when heated isy oounteracted by the projecting portions r8 of the supporting block. 85

Various modifications embodyin my invention ma be made without eparting from the spirit and sco e thereof, and only such limitations shoul be placed thereon as are set forth in the appended claims.

I claim as my invention:

1. In an electric furnace, a .furnace wall, a resistor support carried by said wall and comprising a block forming a part of the lining of said wall, said block having portions projecting from the face of said wall, and elongated metallic members fitting in said block and extending out over said proj ectingv portions.

2. A block supported to form a portion of the lining of an electric resistance furnace metallic members itting'in said block and projecting from the face thereof, and projecting portions on'said block extending beneath and in supporting relation with said' 105 metallic members.

3. Ablock supported to form a ortion of the lining of an electric resistance urnace loo' and support a resistor, projecting portions formed on said block, metallic members, the

` ends .of which are bent at right angles in opposite' directions, one end of said members bein# embedded in said block,the central portion of said members resting upon the projecting portions of said blocks, and the opposite ends of said members adapted to retain convolutions of Said resistor in position upon said central portion.

4. In an electric furnace, a refractoryA furnace Wall, a resistor support carried'by said Wall and comprising a refractory block of substantially the same material as the lining of said wall, said block having a\ portion projecting from the face of the wall, and an elongated metal member having an end portion tting in s aid block and having other portions thereof extending out over said rojecting portion of the support.

5. n an electric furnace, a refractory furnace Wall, a resistor support carried b said wall and comprising a refractory bloc of substantially the same material as the lining of. said Wall, said block having a' portionI extending forwardl from the face of the Wall and a recess in t e upper face there-` of, and a metal member fittin in to the recess in said block and exten 'ng out over said projecting portion, the metal member being heldin said recess by a superposed part of the Wall.

In testimony whereof, I 'have hereunto subscribed my name this 3rd day of January, v1927. v-

ALVIN D. KEENE. 

